The Canadian Pacific Railway mainline roughly follows the alignment of Lougheed Highway in this area, and skirts the south and east sides of the interchange.

Vehicles making those movements should use the Brunette Avenue Interchange, 4 km west of the Cape Horn.

All other turning movements must be made over an overpass and down a small connecting road to a light (which forms a continuous green t-intersection with the Lougheed Highway mainline).

Via this connection, traffic from Mariner Way and Cape Horn Avenue (two major residential roads in Coquitlam) may also access the interchange.

This entrance leads directly into the separated lanes for 152nd Street in Surrey, and they can merge back onto the mainline of the freeway after the exit to 152nd.